---
title: std.itoa
summary: null
url: https://www.fastly.com/documentation/reference/vcl/functions/strings/std-itoa
---


Converts the integer `value` to a string in the given `base`.

The `base` value defaults to 10 (decimal) and can range from 2 to 36 (inclusive).

Base prefixes, such as hexadecimal (`0x`) and octal (`0`), are not
included.

The character set used is `0123456789abcdefghijklmnopqrstuvwxyz`
(`0-9a-z`).

## Errors

If the `base` argument is less than 2 or greater than 36, then
`fastly.error` will be set to `EINVAL`.

## Example

```vcl
# decimal: "-10"
std.itoa(-10)

# hexadecimal: "2a"
std.itoa(42, 16)
```